Filtering apparatus.



A T. BREAKELL.

FILTERING APPARATUS. APPLIOATION FILED MAR.12,1910.

Patented June 17, 1913.

T. BREAKELL.

FILTERING APPARATUS. APPLICATION FILED MAR. 12, 1s1o,

?atented Juae Z7,

3 $HEET3SHEET 2.

T. BREAKER.

EILTERING umm'rus.

APPTIOATION FILED MAR. 12, 1910.

Patented June 17, 3 SHEETS-SHEET 3.

ATTY s rs arer rare.

TI-TCMAS BREAKELL, OF WIRKSWOR'IH, ENGLAND.

FILTERIIV' G APPARATUS.

T0 all'whom it may concern Be it known that I, THOMAS BREAKELL, asubject of the King of Great Britain and Ireland, and residing atPrassington Hall, Wirksworth, in the county of Derby, England, haveinvented certain new and useful Filtering Apparatus, of which thefollowing is a specification.

This invention relates to apparatus for: separating liquids frommaterials and for washing and saturating materials with liquids as, forexample, in the treatment of slimes in the recovery of precious metalsand: more particularly in the treatmentof gold ore slimes by the cyanidprocess in which process it is usual to treat the slimes with a strongsolution, then to wash the residue with a ward with a wash water.

The main object of the present invention is to obtain a separation ofthe filtered liquid into two or more parts, as may be required, in thesame machine and the aforesaid operations carried-on simultaneously.

The invention is applicable to the type of apparatus comprising arevolving barrel having afiltering medium arranged around its periphery,means for withdrawing air and any filtered liquid from the interior ofthe barrel, and means for applying the slime and removing the residuefrom the exterior surface of the barrel.

Further objects of my invention are to provide means for insuring thatthe slime is applied evenly and of a uniform thickness to the filteringsurface; that the application of the weak solution and wash water isefiected evenly across the surface of the material being treated; thatthe removal of they residue is effected evenly so as to prevent theformation of grooves or ridges on the surface of the filter; and thatthere shall be no leakage of air through the filtering medium= at thepart where the residue is removed. These devices render the working ofthe apparatus as perfect and economical as possible and cause thedivision of the several solutions to be as clean as possible from oneanother.

Referring now to the accompanying drawings which illustrate apparatusconstructed according to the invention :Figure .1 is a plan view of oneform of the apparatus, Fig. 2 is a sectional elevation of the same;

Fig. 3 1s a cross section of the same-Fig. 4

, Specification of Letters Patent. Application filed March 12, 1910.Serial No. 559,957.

weak solution and afteri vided all around the inside periphery of thebarrel in order to prevent the liquid which passes through the filteringmedium I) from Patented June 17,1913.

shows a modified manner of arranging the residue removing means; andFig. 5 is an end view of an apparatus showing certain detailshereinafter referred to.

Referring first to Figs. 1 to 3, a desighates the barrel having afiltering surface 7) and arranged to rotate on any suitable supportingframe 0 through the medium of a driving pulley z'. Within the barrel isarranged a stationary receptacle (Z divided by a partition 6 into twocompartments f and g each of which preferably extends, as

shown in Fig. 3, across about one half of the interior of the barrel andalso throughout substantially the whole length'of the barrel". A space71. is left beneath the receptacle inside the barrel.

A series of ribs or pro ections Z are prodown the same into the bottomof the barrel.

These ribs or projections Z cause the liquid to drip off their ends andfall into the receptacle d as hereinafter described.

The slime is fed on to the barrel at or about the middle of the risingside. The means shown for effecting this comprises a slime receptacle orcontainer n formed by a knife or scraper element 0 the lower edge m ofwhich serves to remove the residue by being arranged close to thefiltering-surface 7). Means are provided, if necessary, to prevent thematerial escaping through the ends of the slime container W. said meanscomprising end plates attached to the knife and shaped to suit thecurvature of the barrel. By this arrangement-of the knife there is nopossibility of air'being drawn directly through any portion of thesurface of the barrel filter 79 since every portion is covered by alayer of material. erably provided for maintaining the level of theslime constant. This is effected by providing an overflow pipe p fromthe container n and providing means for feeding the slime into thecontainer at a greater rate than it is taken up by the barrel. Thesurplus which passes out by the overflow pipe 7) is returned by a pumpdirect to the container or to a suitable tank arranged above the levelof the container into which it flows by gravitation.

In the operation of this apparatus the Means are also preftank may beused to draw modified arrangement for liquid which passes through thefiltering medium 7) from the freshly applied slime drips oil theadjacent ribs Z into the conn partment f of the receptacle around pastthe top position, more water is fed to the same, by means hereinafterdescribed and the liquid which then passes through the'barrekfalls intothe compartment 9 of the receptacle d and forms a weak solution. Thefinal washing water is fed onto the barrel from a pipe 9 as-hereinafterdescribed or the bottom of the barrel may dip into a water tank r whichcauses the slime to be further Washed and the liquid passing throughinto the space it in the-barrel from'this source forms what is known aswash water. i

The means for feeding the water on. to the top of the barrel is shown ascomprising a water supply pipe a perforated along its length and aroller t covered with felt or the like on to which the water This rolleris in contact with the filtering surface 6 and is rotated thereby, theaction of said roller being to thoroughly spread the water and insureeven feeding of the same to the barrel surface. The device for spreadingthe water Water pipe q is shown as comprising a gauze or otherperforated roller u encircling the pipe and in contact with the barrelsur face- Of course either of these spreading devices may be used ineither position. Further the spreading action-maybe effectcd byreciprocating the perforated supply pipes longitudinally being stillretained or dispensed with as desired. Means for efiecting thereciprocation of one of these pipes is shownat the left of Fig. 5 andcomprise a cam plate 1; adapted to oscillate one end of a lever topivoted to a fixed pivot 7 the other end of said lever being adapted toreciprocate the pipe'. Y

Three fixed conduits 2, 3 and 4% pass axially out of he barrel a, saidconduits dipping rcspectiit'ely into the liquids conta-ined in thecompartments f and g and the space it. These conduits are provided fordrawing on the solutions and also for maintaining the suction within thebarrel and are preferably formed as a single pipe, where they assthrough the bairel loearing, divided into three channels.v The conduitsare either connected to separate compartments of a common tank having anair pump connected to its top or a separate pump and all each liquid.,Referring now to Fig. 4 which shows a the knife, when "feeding theslime on to the bottom of the barrel, said knife 0 is arranged on thedescending side ofthe barrel (1. the lower end 5 dipping into the slimein the container 1' cl and forms a strong solution. As the slime iscarried is discharged.

discharged from the the rollers z and u shown at the r! I beingconnected at ltSCt'llEI' and to the upbarrel. With this arrangement theslime is the curvature of the fed on to the bottom part of the harreland V the knife together with its end plates, forms a shield for thescraped part of the filter ing surface. The slime will rise into thisshield owin to the suction through the filtering surihce from the insideof the bar-- rel, said suction also keeping the shield pressed towardthe barrel. By this means no air can leak through this part of the bar.-rel. Should the level of the slime in the container r vary slightly itwill not effect the amount of slime fed on to the filtering surface but,if desired, a regulation of the level may be effected by an overflowdevice as described above. With the feed arranged in this manner it willbe understood that the bottom part of the barrel will extract the strongsolution and the divided receptacle (Z will catch the weak solution andwash water from the upper part of the filtering surface.

The water food pipes will be arranged of course sul'istautially at 6 and7 respectively.

in order to insure that the knife or scraper 0 removes the residue fromthe filtering surface in'an even manner and Without forming grooves orridges thereon, is preferably adapted to reciprocate slightly in alongitudinal effected by the cam v adaptedto oscillate one end. of the,vcr w, pivoted at y", as ht Fig. said lever per end the knife 0 i vhcinthe knife 0 reciprocaterl in this manner. end may he formed cit Illmaterial. 7 my invention what a rim as new and uesire to secure byLettors Patent isrl. .f't machine for separating liquids materials andfor xv'ashing; nd cater materials with liquids compr' ing con ouscylindrical filtering surface, means for rotating'said su face, meansfor constantly exerting a uniform suction within said surface,stationary means for ap ilying the ma terial to said surface, sntionarydevices spaced from said applying means and from one another, forapplying a wrestling medilllll to'the material at. a plurality oi igaints and stationary means for separately catching and wi from materialsand for washing and saturating admiring, the filtrates which '5 I passthrough the filtering means A machine for separating liquids from icedirection. '"lhis may be upon said filtering surface,

with the filtering sur is fed onto the material whereby the latter saidsurface, an edge to said knife'for removing the residue from thefiltering surface and means for catching the filtrate '3. A machine forseparating liquids from materials andfor washing and saturatingmaterials with liquids, comprising a continuous filtering surface, meansfor rotating said surface, means for exerting a suction upon saidfiltering surface, a container from which the material is applied to thefiltering means, a knife for removing the residue from the filteringsurface, means for reciprocating said knife longitudinally, and meansfor catching the filtrate which passes through said filtering surface.

4. A machine for separating liquids from materials and for washing andsaturating materials with liquids, comprising-a cylindrical filteringsurface, means for exerting a suction within said surface, means forrotating said surface, a knife forming with said filtering surface acontainer for the material whereby it is fed on to the said surface, anedge to said knife for removing the residue from the filtering surface,stationary means, spaced from said container, for applying a washingmedium to the material, and means for separating the filtrates whichrespectively pass through the filtering surface before reaching thepoint of application of the washing medium, and after passing saidpoint.

5. A machine for separating materials and for washing and. saturatingmaterials with liquids, comprising a cylindrical filtering surface,means for exerting a suction within said surface, mcansfor rotating saidsurface, a container from which the material is applied to the filteringmeans, a knife for removing the residuefrom the filtering surface, meansfor reciprocating said knife longitudinally, stationary means spacedfrom said container, for applying a washing medium to the material, andmeans for separating-the filtrates which respectively pass through thefiltering surface before reaching the point of applicasign of thewashing medium and after pass said point.

t). A machine materials and for washing and saturating materials withliquids, comprising a con tinuous surface for filtering the material,means for applying the material to said filtering surface to effectinitial filtration thereof, a supply pipe for a washing medium spacedfrom said applying means, a distrilmting roller engaging the filteringliquids from.

"which passes through said filtering surface.

' separating of said filtering surface, means for separatlng liquidsfrom surface and arranged to receive the washing medium from said pipe,and means for the initial filtrate from the filtrate which passesthrough the filtering surface subsequent to the application of thewashing medium thereto.

I. A machine for separating liquids from materials and for washing andsaturating materials with liquids, comprising a cylindrical filteringsurface, means for exerting a suction within said surface, means fortotating said surface, stationary means for applying the material tosaid surface, a supply pipe for a washing medium spaced from saidapplying means, a distributing roller engaging the filtering surface andarranged to receive the washing medium from said pipe, and means forseparating the filtrates which respectively pass through the filteringsurface before reaching the point of contact of the distributing rollerand after passing said point.

8. A machine for separating liquids from materials and for washing andsaturating materials with liquids, comprising a continuous filteringsurface, means for rotating said surface, means for exerting a suctionupon said filtering surface, means for applying the material to saidsurface, a supply pipe for a washing medium spaced from said applyingmeans, spaced. orifices in said pipe through which the washing mediumpasses on to the filtering surface, means for reciprocating said pipe,and means for catching the filtrate which passes through said filteringsurface.

9. A machine for separating liquids from materials and for washing andsaturating materials with liquids, comprising a cylindrical filteringsurface, means for rotating said surface, means for applying the material to the outer side of said surface to effect initial filtrationthereof, means for applyinga washing medium to the material subsequentto said initial filtration whereby a subsequent filtration occurs,projectionsem the inner side of the filtering surface from which thefiltrates drip and meansfil into which the filtrates drip forseparating; the initial and subsequent filtrates.

10. A machine for separating liquids trom materials and for washing andsatiri'iiating materials with liquids, comprising ajcylindricalfiltering surface, means for constantly exerting a uniform suctionwithin the whole for rotating said surface, stationary means forapplying the material to said surface, stationary means spaced from saidapplying means for applying a washing medium to the material, stationarymeans for separately catching the filtrates which respectively passthrough the filtering means before reaching the point of application ofthe washing medium and after passinmsaid point, and means forWithdrawing the separated filtrates from the filtering surface, meansfor rotating said said stationary means for catching the till trates,during the operation of the machine.

11. A. machine for separating liquids from materials and for Washing andsaturating materials with liquids comprising a cylindri-- cal filteringsurface,, means for constantly exerting a suction Within. vthe whole ofsaid filtering surface, means for rotating said surface, stationarymeans for applying the material to said surface, stationary means spacedfrom said applying means for applying a Washing medium to the materialand a stationary receptacle divided into a plurality of compartmentsarranged Within the filtering surface for catching and separating thefiltrates which res ectively pass through the filtering means be 'orereaching the point of application ofthe Washing medium and after passingsaid point.

12. A machine for separating liquids from materials and for Washing andsaturating materials with liquids comprising a cylindrical filteringsurface, means for constantly exerting a suction within the whole ofsaid the Washing medium surface, stationary means for applying thematerial to said surface, stationary means. spaced from said. applyingmeans for app ying a Washing medium to the material, a stationaryreceptacle divided into a plurality of compartments an ranged Within thefiltering surface for re ceiving and separating the filtrates whichrespectively pass through the filtering means before reachingthe pointof application of and after said point, and pipes communicating with thecompart-merits of the stationary receptacle and with the lower portionof the interior of the cylindrical filtering surface for Withdrawing theseparated filtrates during the operation of the machine.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing Witnesses.

THOMAS BREAKELL,

Witnesses:

- M. F. STARLING, W. J. SKERTEN.

